87c1515f   
   XPost: rec.radio.shortwave   
   From: detritus@ix.netcom.com   
      
   arthrnyork@webtv.net wrote:   
      
   > On Nov 14, 9:59 am, Lord Valve  wrote:   
   > > John Smith wrote:   
   > > > On 11/13/2011 2:19 PM, Lord Valve wrote:   
   > > > > John Smith wrote:   
   > >   
   > > > >> On 11/13/2011 10:25 AM, Lord Valve wrote:   
   > > > >>> Don Pearce wrote:   
   > >   
   > > > >>>> On Sun, 13 Nov 2011 08:38:28 -0700, Lord Valve   
   > > > >>>>    wrote:   
   > >   
   > > > >>>>> dave wrote:   
   > >   
   > > > >>>>>> On Sun, 13 Nov 2011 11:39:03 +0000, Geoffrey S. Mendelson wrote:   
   > >   
   > > > >>>>>>>> It is much more important to know exactly how long and how well   
   your   
   > > > >>>>>>>> satellite is going to work than to hope to get longer by using a   
   > > > >>>>>>>> technology that might last longer, but will more probably die   
   > > > >>>>>>>> unexpectedly when struck by a cosmic ray burst.   
   > >   
   > > > >>>>>>> Sometimes you can not predict how long a satellite will be used.   
   A   
   > > > >>>>>>> friend of mine worked on a civilian satellite for a defense   
   contractor   
   > > > >>>>>>> and just before the division was sold off, cleaned out any old   
   documents   
   > > > >>>>>>> and files they had on it.   
   > >   
   > > > >>>>>>> Since the satellite he had worked on was way past its expected   
   life (but   
   > > > >>>>>>> still in use), the contracts had long expired, the work was not   
   > > > >>>>>>> classified and a new improved one was due to be launched in a   
   few days,   
   > > > >>>>>>> he was told to dump it all.   
   > >   
   > > > >>>>>>> A few days later, the booster exploded on the pad, and the   
   replacement   
   > > > >>>>>>> was destroyed.   
   > >   
   > > > >>>>>>> The sattelite was kept running for many years, although there   
   were no   
   > > > >>>>>>> documents on what to do or how it was built.   
   > >   
   > > > >>>>>>> Geoff.   
   > >   
   > > > >>>>>> What good is a diagram if the unit is 24,000 miles in the air?   
   > >   
   > > > >>>>> It had better *not* be in the air...  ;-)   
   > >   
   > > > >>>>> Besides - I saw mention upthread of using the ambient   
   > > > >>>>> vacuum with just the tube elements, rather than a typical   
   > > > >>>>> evacuated glass (or other material) enclosure...is the   
   > > > >>>>> vacuum in geosynchronous orbit really hard enough?   
   > > > >>>>> It would seem to me that there are probably plenty of   
   > > > >>>>> gas molecules floating around at that height, even if   
   > > > >>>>> it would still qualify as a "soft" vacuum.  Anybody?   
   > >   
   > > > >>>>> Lord Valve   
   > >   
   > > > >>>> For all sorts of other reasons, standard enclosed tubes are used.   
   Main   
   > > > >>>> reasons are first to contain the electrons so other metalwork   
   doesn't   
   > > > >>>> get involved, and second to maintain the correct physical   
   positioning.   
   > > > >>>> The helix is of very fine tolerance in both pitch and positioning.   
   > > > >>>> Space is certainly hard enough, but the environment around a   
   satellite   
   > > > >>>> is frequently not space, but a diffuse cloud of exhaust gas which   
   > > > >>>> would extinguish a TWT immediately.   
   > >   
   > > > >>>> d   
   > >   
   > > > >>> Ah. Good point!   
   > >   
   > > > >>> Satellites do indeed need to use propellant of some sort   
   > > > >>> to keep in position; I didn't think of that at all.  And it   
   > > > >>> would seem that even if the ambient vacuum were   
   > > > >>> hard enough, conventional construction of the TWT   
   > > > >>> would be needed to keep contaminants out of it during   
   > > > >>> the satellite assembly process down on Terra firma.   
   > > > >>> But I must admit, the idea of using ambient vacuum   
   > > > >>> tickles my fancy a bit.  ;-)   
   > >   
   > > > >>> Lord Valve   
   > >   
   > > > >> I don't recall anyone ever claiming there was no enclose on the   
   devices   
   > > > >> ... just the reasons for enclosing them the way we do on earth is now   
   > > > >> gone ...   
   > >   
   > > > >> Regards,   
   > > > >> JS   
   > >   
   > > > > Do you actually read this shit, or have you been into the medicine   
   cabinet?   
   > >   
   > > > > Lord Valve   
   > > > >    
   > >   
   > > > I usually don't read imbecilic stuff ... such as yours.  But, if I do, I   
   > > > certainly do not take it seriously ... perhaps you will have better luck   
   > > > with others.   
   > >   
   > > > Regards,   
   > > > JS   
   > >   
   > > Oh.   
   > >   
   > > So, you're just another garden-variety cunt.     
   > > Y'all have a Real Nice Day now, y'heah?   
   > >   
   > > Got guns?   
   > >   
   > > Lord Valve   
   > > American - so far- Hide quoted text -   
   > >   
   > > - Show quoted text -   
   >   
   > John Smith confessed once  that he sleeps with a side arm under his   
   > pillow!   
      
   He can't keep it on the nightstand like everyone else?   
      
   You don't want a pistol in the sack with you...you   
   might blow your balls off by accident.  Although, in   
   his case...   
      
      
   Got guns?   
      
   Lord Valve   
   American - so far   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)